evaluate using suitable identity:153²-147²
Answers
Answered by
122
comparing with a^2-b^2 = (a-b) (a+b)
(153-147) (153+147)
6×300
=1800
(153-147) (153+147)
6×300
=1800
kh12:
if we will use this identity it will take more time
but if we do this the answer is also right✔
we will also use this identity if we solve your identity we have a^2 + b^2 identity
the identity which you are saying is a combination of two identities..
yes, if we do this identity we should get full marks
plz answer
tanya it is the same thing we can also write 153 as 150+3 and 147 as 150-3
actually my of math 2days ago i use the identity which i told you but she has deducted my1 mark out of 2is she right✔ tell me
it's math exam actually i write it wrong by mistake
oh
Answered by
56
Using identity :-
a^2-b^2=(a-b) (a+b)
153^2-147^2=(153-147) (153+147)
= 6x300
=1800
Hope it helps you..
a^2-b^2=(a-b) (a+b)
153^2-147^2=(153-147) (153+147)
= 6x300
=1800
Hope it helps you..
Similar questions